function getipinfo(){
header("Content-Type:text/html; charset=utf-8");
$url = 'http://1111.ip138.com/ic.asp'; //这儿填页面地址
$info=httpGet($url);
$p = "%<center>(.*?)</center>%si";
preg_match_all($p, $info, $arr);
$info=$arr[1];
$str1 = explode("[",iconv('GB2312', 'UTF-8',$info[0]));
$str2 = explode("]",$str1[1]);
$ip=$str2[0].'_'.substr($str2[1],10);
return $ip;
}原文来自：http://www.580bang.com/?post=2 